A conlanger (language inventor) who keeps creating conlangs, then deprecating them and starting new ones.
My first conlang was Arushtrian. It was a relex of English, so I scrapped it as soon as I realized how n00bish it was. Then I took Latin and created Vettizish, an uninspired Latin clone. I scrapped that. Then I created Edétonzhuq, a kitchen-sink lang, and when I realized how unworkable it was I trashed that one too. Then I created Apharish, but after 1 page of grammar and 2 words of lexicon I abandoned it. Then I created Ghandizka, and three weeks later I scrapped it too. I worked out the case system and morphosyntactic alignment for Mezzobradian, but after a month I had only gotten to a 1,200-word grammar and fewer than 100 words of lexicon, and got rid of it as well. I've just started on Pissschludel two seconds ago. I'm a scrapper.
Someone who street fights with no knowledge of how to fight. They're usually seen throwing closed-palm strikes and swing like monkeys. This is your common 'school fighter'